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G. H. TAYLOR. STEAM BOILER.

No. 514,841. Patented Feb. 13, 1894.

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Patented Feb. 13, 1894.

G. H. TAYL STEAM BOIL (No Model.)

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UNITED STATES PATENT OFFICE.

GEORGE HENRY TAYLOR, OF LONDON, ASSIGNOR TO WILHELM OTTO AXEL LOWE, OFLIVERPOOL, ENGLAND.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 514,841, dated February13, 1894.

Application filed August 30, 1893- Serial No. 484,375- (No model.)Patented in England May 23, 1392, No. 91772.

To all whom it may concern.-

Be it known that I, GEORGE HENRY TAY- LOR, a subject of the Queen ofEngland, residing at London, England, have invented certain new anduseful Improvements in Steam- Boilers, (forwhichl have obtainedLettersPatent of Great Britain, No. 9,772, dated May 23, 1892,) of whichthe following is a specification.

This invention relates to water tube steam boilers of the class in whicha gas producer separate from the combustion chamber is employed.

The invention will be best understood by reference to the accompanyingdrawings in which Figure 1 is a longitudinal vertical section of awater-tube boiler constructed according to this invention. Fig. 2 is asectional plan taken upon line zz of Fig. 1. Fig. 3is a vertical sectionof a boiler similar to that shown in Fig. 1, but witha modifiedarrangement of the passages conducting the gases from the producer tothe combustion chamber. Fig. 4 is a sectional plan upon line y-y of Fig.3, and Fig. 5 a similar View upon line 0cw of Fig. 3. Fig. 6 is a frontelevation of the boiler constructed according either to Figs. 1 or 3.Fig. 7 is a vertical longitudinal section upon line uu of Fig. 9 of 'aboiler similar to that previously described, but with a modification inthe gas producer. Fig. Sis asection on line ww of Fig. 7, and Fig. 9 isa Vertical cross section upon line o-o of Fig. 7.

Like letters indicate like parts throughout the drawings.

Referring first to Figs. 1 and 2 A represents a water tube boiler of anywell known construction set in brick-work or masonry in the usual mannerthe course of the flames and heated gases being indicated by the arrows.

A is the receptacle for steam and A is the, flue of the chimney.

B represents the combustion chamber in which the gas from the producerand atmospheric air are mixed, and in which the boiler A is located.

the fire.

E is an injector for forcing atmospheric air and steam into ash-pit orspace D below the fire bars so that the apparatus may be worked byforced draft and inferior fuel used.

F is a bridge forming the back wall of the gas producer 0 the gasesescaping only over the top of the wall into the curved flue or passage Gwhence they escape by the tubes G into the combustion chamber B. Thechannel G is in a tortuous form to give time for the gases from theproducer becoming 7o fixed before they are mixed with the atmosphericair. The air enters preferably from the front of the boiler throughgrids H and channels H rising up through the hollow interior of the wallFand passing down the cen- 7 5 ter compartment thereof into the space Hin the hollow Wall I forming the front of the combustion chamber l3.From the chamber H the air which has become highly heated in itstortuous passage through the heated walls escapes through the tubes Hinto the combustion chamber B mixing with the gas from the producerentering the combustion chamber by the pipes G',the pipes H being placedamong the pipes G to facilitate the mixing of the "gas and air; alargenumber of each of these tubes is employed. Another supply of atmosphericair under pressure or not and mixed with steam if desired may beintroduced into the bottom of the combustion 9o chamber B by tubes J. v

The action of this apparatus is as follows: The fuel is placed in theproducer O upon the fire-bars D and lighted, air to promote combustionbeing supplied by the blower E and passing up between the fire bars Dinto the producer, the gas passes from the producer 0 over the wall Finto the tortuous channel G and by the pipes G into the combustionchamber B where it meets the atmospheric air already highly heated inpassing through the channel H and entering the combustion chamberthrough the pipes H The mingled gas and air as a mass of flame passesamong the tubes of the boiler in the manner that will be well understoodand is indicated by the arrows, and so to the flue A In the modificationshown in Figs. 3, 4 and 5 the general construction and principles ofoperation are the same, but the flue G is extended backward above thegas producer and the hollow wall F and tubes G and II are placed nearlyvertically and directly underneath the front portion of the boilertubes. The operation will be understood from the description alreadygiven of Figs. 1 and 2. The blowerE can be supplied with steam from theboiler by the pipe Eor in any other convenient manner.

The boiler illustrated in Figs. 7, 8 and 9 is similar in itsconstruction and operation to those already described, but instead ofthe gas producer being formed in the brick-setting of the boiler it isplaced in a water-containing shell the interior of which is connectedwith the interior of the boiler tubes. The gas producer 0 is surroundedby a shell K connected by the branch K with the lowest row of boilertubes, the space K being filled with water. The gas producer 0 issupplied with fuel through the hopper 0 controlled by a sliding door Cas before and the fire being stirred or clinkers removed through thedoor 0 at the bottom of the chamber. Or a second door may be provided inthe hopper C in line with the passage leading to the chamber 0 to enablea poker to be introduced through hopper C From the interior of the gasproducerC the gases pass by the flue G into the combustion chamber B andafter circulating among the boiler tubes as already described theyescape to the chimney by a H no A formed in any convenient place in theboiler setting. Air to promote combustion is supplied to the ash-pit orspace D underneath the fire-bars by a blower as before it forced draftis to be used or in the absence of forced draft the air may be freelyadmitted to the space D through a suitable opening, grid or the like, amethod of working which may be adopted in the first describedarrangement if desired in preference to the forced draft. Afurthersupply of air is admitted to the combustion chamber B by the passages IIformed in the brick setting of the boiler, these passages terminating inthe hollow wall I where the air becomes highly heated and delivering theair by the tubes or openings H preferably placed just over the openingsG from the gas producer so that the air and gas become well mixed. Theair entering by the passages II may be propelled by a blower aspreviously described.

In all these arrangements it will be seen that an independent gasproducer located within the setting of the boiler is employed deliveringgas which meets currents of atmospheric air so that excessive combustionof gases is occasioned all around the water tubes of the boiler.

I claim- 1. The combination with a wator-tube boiler, of an independentgas producer located in the boiler-setting and having a wall whichincloses and covers the same, said wall hav ing a tlue leading to thecombustion-chamber; substantially as described.

2. The combination with a water tube boiler having an independent gasproducer located in the boiler setting of an inclosed gas-fixing chamberwith a hollow wall on each side of it over the first of which the gasespass from the producer and through the second of which they pass bytubes into the combustion chamher.

3. The combination with a water tube boiler having an independent gasproducer located in the boiler setting of a gas-chamber having a hollowwall from which the air to support combustion enters and having a hollowwall through which the air passes to the combustion chamber while thegas passes by means of tubes into the combustion chamber through thehollow wall but without entering the same.

4.. The combination with a boiler, of an independent inclosed gasproducer located in the boiler setting, a closed gas-chamber, a hollowwall separating it from the combustion-chamber, tubes leading the gasthrough said wall, and exit openings for the air from said wall;substantially as described.

5. The combination with a boiler, of an independent inclosed gasproducer located in the boiler setting, a closed gas chamber having afront hollow air-heating wall provided with passages leading therefromto a hollow wall separating it from the combustion-chamber, tubesleading the gas through said wall, and exit openings for the air fromsaid wall; substantially as described.

6. The combination with a water-tube boiler, of a water-jacketedgas-producer, and a tube connecting the water jacket with the watertubes; substantially as described.

7. In a water tube boiler the combination with the water tubes and awater-jacketed gas-producer-furuace of side pipes or passages carried inthe side walls of the apparatus and air passages also carried in theside walls of the apparatus and combined and operating as set forth.

8. The combination with a water-tube boiler, of a gas producer, having awater jacket which incloses and covers the same, a combustionchamberbelow the water tubes, and a flue In testimony whereof I have hereto setmy leading through said water-jacket to the comhand in the presence ofthe two subscribing I0 bustion chamber; substantially as described.witnesses.

9. The combination with a water-tube boiler,

5 of a water-jacketed gas producer, a fixing GEORGE HENRY TAYLOR chamberbetween the gas-producer and the Witnesses: bridge-wall, and acornbusti0nchan1ber below ALFRED J. BOULT,

the water tubes; substantially as described. 7 HARRY'B; BRIDGE.

